Lawn sprinkler



FIG. 1 is a top plan view of a lawn sprinkler, showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is an end elevational view thereof; and

FIG. 6 is an elevational view of the end opposite that shown in FIG. 5 thereof. 

The ornamental design for a lawn sprinkler, as shown. 